Number keys not working

I hope someone can help me. Just recently some of my keys on my keyboard are not working. It is the key right next to the number 1 button, numbers five and six, the dash key, the plus key, and the delete key. None of them are working. I hope that someone can help me. I don't have an keyboard hooked up to the computer. It is the keyboard on my lap top. Thank you for your time!